74HC595 Shift Register 7-Segment 8-Bit Serial-in Parallel-Out

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74HC595 Shift Register 7-Segment 8-Bit Serial-in Parallel-Out can receive (input) data serially and control 8 output pins in parallel.

This comes in very handy where do not have enough GPIO pins on our MCU/MPU to control the required number of outputs.

74HC595 is often used in projects where relatively a large number of LED’s has to be controlled through the Microcontroller.

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74HC595 Shift Register 7-Segment 8-Bit Serial-in Parallel-Out can receive (input) data serially and control 8 output pins in parallel.

This comes in very handy where do not have enough GPIO pins on our MCU/MPU to control the required number of outputs. 74HC595 is often used in projects where relatively a large number of LED’s has to be controlled through the Microcontroller.

74HC595 Shift Register 7-Segment IC is that it can be cascaded to control more than 8 outputs. To do this we use the Q7’ (pin 9), this pin should be connected to the data pin of the second 74HC595 IC.

This way the first 8-bit sent from MCU will be used by the 1st IC and the second 8-bit will be used by the 2nd IC.

This 74HC595 Shift Register 7-Segment can also use to interface LCD screen since they acts as the data bit for the LCD displays.

It can also be used to control 5V loads like relays through a 3.3V microcontroller since the high-level voltage is only 3.15. So if you are looking for an IC to save on your GPIO pins on the Microcontroller then this IC might be the right choice for you.

74HC595 Shift Register 7-Segment commonly use with microcontrollers or microprocessors to expand the GIPO functionalities. It requires only 3 pins connected to the MCU, which are Clock, Data and Latch. It has a wide operating voltage from 2V to 6V.

Specifications

  • 8-bit, Serial In – Parallel out Shift register
  • Operating Voltage: 2V to 6V
  • Power Consumption: 80uA
  • Output source/sink current: 35mA
  • Output Voltage is equal to Operating voltage
  • Minimum high-level Input Voltage: 3.15V @(Vcc=4.5V)
  • Maximum low-level Input Voltage: 1.35V @(Vcc=4.5V)
  • Can be easily cascaded with more IC to get more outputs
  • Maximum Clock Frequency: 25Mhz @4.5V
  • Available in 16-pin PDIP, GDIP, PDSO packages

74HC595 Shift Register 7-Segment Applications

  • Expand the GPIO pin on a MCU/MPU
  • LED Matrix/Cube Projects
  • Interface LCD
  • Cascading applications
  • High logic level controller

74HC595 Shift Register 7-Segment Pin Configuration

Pin Number Name Description
1,2,3,4,5,6,7 Output Pins (Q1 to Q7) The 74hc595 has 8 output pins out of which 7 are these pins. They can controll serially
8 Ground Connected to the Ground  of the circuit
9 (Q7) Serial Output This pin is used to connect more than one 74hc595 as cascading
10 (MR) Master Reset Resets all outputs as low. Must be held high for normal operation
11 (SH_CP) Clock This is the clock pin to which the clock signal has to be provided from MCU/MPU
12 (ST_CP) Latch The Latch pin is used to update the data to the output pins. It is active high
13 (OE) Output Enable The Output Enable is used to turn off the outputs. Must be held low for normal operation
14 (DS) Serial Data This is the pin to which data is sent, based on which the 8 outputs are controlled
15 (Q0) Output The first output pin.
16 Vcc This pin powers the IC, typically +5V used.
74HC595 Shift Register 7-Segment Pinout

 

74HC595 Pinout

74HC595 Pinout Arduino

74HC595 pinout Arduino

datasheet

ti.com/lit/ds/scls041i/scls041i.pdf

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